Originally Posted by TrknGMC
10k miles here on a 302 with dual carbs. It’s not a gas hog. 18-24 mpg.

How do you get that kind of MPG? You shut the truck off while going down the hills? Is that the mileage of the towing vehicle pulling the trailer which your GMC is on? 18-24 MPG seemingly defies Einstein's Theory of Special Relativity, E=mc2.
Inquiring minds would like to know.

1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission